useResizeObserver

报告元素内容或边框尺寸的更改

¥Reports changes to the dimensions of an Element's content or the border-box

示例

源代码演练场

Resize the box to see changes

用法

¥Usage

<script setup lang="ts">
import { useResizeObserver } from '@vueuse/core'
import { ref, useTemplateRef } from 'vue'

const el = useTemplateRef('el')
const text = ref('')

useResizeObserver(el, (entries) => {
  const entry = entries[0]
  const { width, height } = entry.contentRect
  text.value = `width: ${width}, height: ${height}`
})
</script>

<template>
  <div ref="el">
    {{ text }}
  </div>
</template>

指令用法

¥Directive Usage

<script setup lang="ts">
import { vResizeObserver } from '@vueuse/components'

const text = ref('')

function onResizeObserver(entries) {
  const [entry] = entries
  const { width, height } = entry.contentRect
  text.value = `width: ${width}, height: ${height}`
}
</script>

<template>
  <div v-resize-observer="onResizeObserver">
    {{ text }}
  </div>
</template>

调整大小观察者 MDN

¥ResizeObserver MDN